merge completion suggestions based upon relevance

pkg/analysis_server/test/domain_completion_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/analysis_server.dart';
@@ skipping 646 matching lines @@
     addTestFile('''
 import '/libA.dart';
 class B extends A {
   m() {}
   x() {^}
 }
 ''');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
-      assertHasResult(CompletionSuggestionKind.INVOCATION, 'm');
+      assertHasResult(CompletionSuggestionKind.INVOCATION, 'm',
+          relevance: DART_RELEVANCE_LOCAL_METHOD);
     });
   }
 
   test_locals() {
     addTestFile('class A {var a; x() {var b;^}} class DateTime { }');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
       assertHasResult(CompletionSuggestionKind.INVOCATION, 'A');
       assertHasResult(CompletionSuggestionKind.INVOCATION, 'a',
@@ skipping 18 matching lines @@
 
   test_overrides() {
     addFile('/libA.dart', 'class A {m() {}}');
     addTestFile('''
 import '/libA.dart';
 class B extends A {m() {^}}
 ''');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
-      assertHasResult(CompletionSuggestionKind.INVOCATION, 'm');
+      assertHasResult(CompletionSuggestionKind.INVOCATION, 'm',
+          relevance: DART_RELEVANCE_LOCAL_METHOD);
     });
   }
 
   test_partFile() {
     addFile(
         '/project/bin/testA.dart',
         '''
       library libA;
       part "$testFile";
       import 'dart:html';
@@ skipping 269 matching lines @@
 }
     ''');
     await waitForTasksFinished();
     Request request =
         new CompletionGetSuggestionsParams(testFile, 0).toRequest('0');
     Response response = handler.handleRequest(request);
     expect(response.error, isNotNull);
     expect(response.error.code, RequestErrorCode.NO_INDEX_GENERATED);
   }
 }